3 song CD player... - diyAudio
Go Back   Home > Forums > Source & Line > Digital Source

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 19th July 2005, 02:04 PM   #1
rabbitz is offline rabbitz  Australia
diyAudio Member
 
rabbitz's Avatar
 
Join Date: Jul 2003
Location: Newcastle, Australia
Default 3 song CD player...

I've just bought a Sony CDPXE270 from eBay to use in a secondary system and is weird. Plays fine for the first few songs, about 15 minutes and then the sound becomes distorted and gets worse. Stop the player and let it sit for 10 minutes and all is well, so it could be heat related.

The distortion is similar to the sound you get when turning off an amp while music is playing and being fed by draining caps and also a bit like an FM station not tuned properly.

I've ordered a service manual and would appreciate any advise on directions or thoughts on this.

Initially I was looking at a power supply problem but the regs are putting out the right voltage and legs are intact. The supply to the op amp is not symmetrical with -14.25V and + 13V, but looks like it uses a virtual ground and this supply comes straight from the main caps after rectification.... not regulated so I'd say the smaller +ve value is due to other parts of the circuit running 5V and 7V via regs. I've been over the main board looking for bad solder joints.

The laser appears to be working OK as I put a toture CD through and plays tracks that a budget player normally does and tapping the chassis both vertical and horizontal doesn't induce skipping.

An ideas of where to start?

BTW, I'm not going to send it back as shipping is worth half the player price and you never know, I might learn something.
  Reply With Quote
Old 20th July 2005, 05:12 AM   #2
Gasho is offline Gasho  Croatia
diyAudio Member
 
Gasho's Avatar
 
Join Date: Nov 2004
Location: Zagreb
Did you check , all other power supplyes?
Something is heatig up , and voltage is dropping.
Look at digital PS , that powering DAC,Filter.... It must be 5V+-.
You can try with cold spray . Open the machine , power it up , start play , and when player start to distord , spray one by one ,every active component (regulator, chips...)

You can buy Cold spray in every electronic shop.
  Reply With Quote
Old 20th July 2005, 07:19 AM   #3
rabbitz is offline rabbitz  Australia
diyAudio Member
 
rabbitz's Avatar
 
Join Date: Jul 2003
Location: Newcastle, Australia
Once again, thanks for your advice and I'll go get a can and give it a try.

Cheers
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
~ Best Wedding Song ~ rick57 Music 49 22nd October 2007 04:02 PM
Windows MP3/song player that caches whole song in RAM before playing Daveis Digital Source 10 2nd October 2007 03:37 AM
Most covered song? infinia Music 1 5th April 2006 02:12 AM
do you know this song? kinser Music 3 16th June 2004 12:57 PM


New To Site? Need Help?

All times are GMT. The time now is 05:25 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2